Viessmann SH20, Installation And Service Instructions For Contractors

Page: 48 / 80

48
The following service functions can be selected:
■ "Diagnosis" , see from page 48
■ "Actuator test" , see from page 26
■ "Code 1" , see from page 35
■ "Code 2" , see from page 35
■ "Fault history" , see from page 51
■ "Service functions" , see from page 48
■ "Terminate service" , see from page 48
Calling up the service menu
The service menu can be activated from any menu.
Press the following keys:
1. + Simultaneously for approx. 4 s.
The
"Service" menu appears.
2.
|
/
~
For the required service function.
Exiting the service menu
You can leave the service menu as follows:
■ By pressing
ä
■ Automatically after 30 min
■ Menu point "Terminate service"
Diagnosis
Buffer
Heating
DHW
Boiler
Buffer drawing
Select with
(
Fig. 30
Press the following keys:
1. + Simultaneously for approx. 4 s.
The
"Service" menu appears.
2.
|
/
~
For "Diagnosis" .
3.
d
To confirm.
4.
|
/
~
For the required parameter.
5.
ä
repeatedly, until the standard display
is shown.
This terminates the diagnosis.
The Diagnosis menu is divided into the following sub-
menus:
■ "General" , see page 48
■ "Boiler" , see page 49
■ "Heating" , see page 49
■ "DHW" , see page 49
■ "KM BUS" , see page 49
Diagnosis: General sub-menu
"Outside temperature" Press OK to display adjusted and actual outside tem-
peratures.
"Central fault" Ext. output for on-site fault signalling unit
"Time" Displays the set time
"Date" Displays the set date
Diagnosis and service scans
Service functions
5684984
Diagnosis